Support Galaxy Nexus radio/modem failure, baseband version : unknown

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I got a new Galaxy Nexus from Google Play from US and got it to India. It worked for two days. 2G/3G etc. At times I have week signal. Once after charging when I took the phone, baseband was dead. I tried factory reset, nothing helped.
Now I get following status
Following are the details of issue seen while checking About Phone
Baseband version : Unknown
Status
IMEI : Unknown
IMEI SV : Unknown
Service state : out of service/Radio off (keeps toggling every few seconds)
(General)